Product information

Overview
The Nitecore UM4 charger can recharge up to 1500 mAh on a single slot, or 3000 mAh by distributing 1500 mAh across two slots simultaneously. Equipped with a Micro-USB input port, it accepts multiple power sources: external battery (PowerBank), solar panel, or a standard USB wall adapter. The charging current directly depends on the connected source. Therefore, the charging speed can vary, especially between solar power and a standard wall outlet.

It allows, for example, to recharge a 3500 mAh battery to 80% in just two hours. Its built-in LCD screen provides precise information on:
  • The charge status of each battery
  • The internal resistance
  • The number of mAh already charged
  • The elapsed charging time
  • The voltage
  • The output current
  • The recognized battery type

Special program for IMR batteries
This model features a specific mode for IMR batteries, allowing controlled charging management, which helps extend the lifespan of sensitive batteries.
By holding down the C button, the user accesses a manual adjustment mode, useful for customizing charging parameters according to the characteristics of the inserted battery.
The Nitecore UM4 is designed for optimal safety with protection against overheating and short circuits.

Integrated safety technologies
  • Intelligent temperature regulation system
  • Real-time LCD display of charging parameters
  • Reverse polarity protection
  • Automatic charge stop function
  • Optimized thermal management with efficient dissipation
  • Automatic detection of battery type and capacity
  • Automatic or manual selection of current and voltage
  • Discharged IMR battery recovery function

Supported batteries

  • 🔋 Compatible Li-ion and IMR batteries: 10440, 14500, 14650, 16500, 16340 (RCR123), 16650, 17350, 17500, 17650, 17670, 18350, 18490, 18500, 18650, 18700, 20700, 21700, 22500, 22650, 25500, 26500, 26650, 26700
  • 🔋 Supported Ni-MH / NiCd batteries: AA, AAA, AAAA, C, D
This charger is perfectly suited for mobile use thanks to its universal USB connection, making it very convenient on the go.

Technical specifications
  • Input: DC 5V/2A – 9V/2A (max. 18W)
  • Outputs: 4.35V / 4.2V / 3.7V / 1.48V
  • Output current according to selected mode:
  • Fast mode: 1.5A x1, 1.5A x2, or 750 mA x4
  • Standard mode: 1.5A x1, 1A x2, or 500 mA x4
  • Dimensions: 159 mm x 107 mm x 41 mm
  • Weight: 232.8 g (excluding batteries and cable)
  • Number of batteries: 4 batteries can be charged simultaneously
  • Automatic shut-off function after 20 hours to prevent any risk of prolonged overheating.
  • Compliance and warranty
  • Certified CE, RoHS, FCC, and CEC
  • Supplied with a USB charging cable
  • Color: Black
  • Manufacturer's warranty: 1 year
Tech Specs
Manufacturing country
RPC
What’s in the Box
Content
Chargeur NITECORE UM4
Câble USB-C vers USB-A
Manuel + carte de garantie
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